Blender game engine development directions?
Ton Roosendaal covers this in the Blender roadmap – 2.7, 2.8 and beyond


  What should then be dropped is the idea to make Blender have an
  embedded “true” game engine. We should acknowledge that we never
  managed to make something with the portability and quality of Unreal
  or Crysis… or even Unity3D. And Blender’s GPL license is not helping
  here much either.


If you want to develop a game today you can model assets with blender, but should better pick another game engine.